hu.webarticum.chm

Class AbstractCommand

java.lang.Object

hu.webarticum.chm.AbstractCommand

All Implemented Interfaces:

Command

Direct Known Subclasses:

CommandAggregation

public abstract class AbstractCommand
extends java.lang.Object
implements Command

Commons for commands.

Constructor Summary

Constructors

Constructor and Description
AbstractCommand()

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	_execute()
protected abstract boolean	_rollBack()
boolean	execute() Executes this command
java.util.Date	getTime() Returns time when this command was first executed.
boolean	isExecuted() Returns true if command have been already executed and is not rolled back.
boolean	rollBack() Rolls back this command
void	setExecuted(boolean executed) Explicitly sets executed status, do not perform any execution or roll-backing.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractCommand

public AbstractCommand()

Method Detail

execute

public boolean execute()

Description copied from interface: Command

Executes this command

Specified by:

execute in interface Command

Returns:

true if command was successfully executed

rollBack

public boolean rollBack()

Description copied from interface: Command

Rolls back this command

Specified by:

rollBack in interface Command

Returns:

true if command was successfully rolled back

setExecuted

public void setExecuted(boolean executed)

Description copied from interface: Command

Explicitly sets executed status, do not perform any execution or roll-backing. Use this if operation already performed elsewhere. It should not be invoked before this command executed (unless the command's implementation is properly prepared for this).

Specified by:

setExecuted in interface Command

isExecuted

public boolean isExecuted()

Description copied from interface: Command

Returns true if command have been already executed and is not rolled back.

Specified by:

isExecuted in interface Command

Returns:

true if command have been already executed

getTime

public java.util.Date getTime()

Description copied from interface: Command

Returns time when this command was first executed.

Specified by:

getTime in interface Command

Returns:

time when this command was first executed or null

_execute

protected abstract boolean _execute()

_rollBack

protected abstract boolean _rollBack()